North of Shoshone Idaho
Geologists call Shoshone Ice Cave one of Earth’s natural wonders.
It’s the largest known lava ice cave in the world, extending 1,000 feet deep.
The largest cavern in the ancient lava tube is three blocks long, 30 feet wide and 40 feet high. Tunnels are 90 feet below the surface, keeping the air temperature at a constant 18 to 33 degrees.
Ice forms in the cave as air currents flow through the tubes, causing subterranean water to freeze.
The cave was discovered in 1880. Early residents of Shoshone harvested ice from the cave, giving the town a reputation as being the only place for hundreds of miles where one could buy a cold beer.